Machine for grinding mill-rollers



3 Sheets-Sheet 1.

(No Model.)

H. N. J. MANSFIELD. MAGHINE FOR GRINDING MILL ROLLERS.

Patented Apr. 22, 1890.

(N0 Mode l.) 3 Sheets-Sheet 2.

' H. N. J. MANSFIELD.

MACHINE FOR GRINDING MILL ROLLERS.

No. 426,192. Patented Apr. 22,1890.

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(No Model.) 3 Sheets-Sheet 3.

H. N. J. MANSFIELD; MAGHINB FOR GRINDING MILL ROLLERS.

No. 426,192. Patented Apr. 22, 1890.

ms NORRIS warns on., momma, vusmmmm, v. c.

IIIRAM N. J.

MANSFIELD,

OF MALONE, NE\V YORK.

MACHINE FOR GRINDING MILL-ROLLERS.

SPECIFICATION forming part of Letters Patent No. 426,192, dated April22, 1890.

Application filed June 1, 1889- Serial No. 812,861. (No model.)

To aZZ whom it may concern:

Be it known that I, HIRAM N. J. MANsFInLD, a citizen of the UnitedStates, residing at Malone, in the county of Franklin and State of NewYork, have invented a new and useful Machine for Grindin Mill-Rolls, ofwhich the following is a specification.

This invention relates to machines for grinding the faces of the rollersin calendering-machines, rol1er-mills, and other places where stacks ofmetal rolls are employed; and it has for its object to construct amachine which may be mounted detachably upon the rollerframe, and bymeans of which the rolls may be ground without the expensive andlaborious process of detaching them from the frame in which they aremounted.

The invention consists in the improved construction and combination ofparts, which will he hereinafter fully described, and particularlypointed out in the claims.

In the drawings hereto annexed, Figure 1 is a front elevation of theroller-frame of a calenderingmachine to which my improved roll-grindingmachine has been applied in position for operation. Fig. 2 is a sideelevation of the roll-grinding machine detached from the roller-frame.Fig. 2 is a detail. sectional View of the stud-bolt lat andscrew-threaded rod 16. Fig. 2 is a plauview of the same. Fig. 3 is avertical sectional view taken on the line 5 z of Fig. 1 and showing thegrinding-disk in. side elevation. Fig. 4 is a perspective view of one ofthe vertical posts or side beams of the grinder-frame. Fig. 5 is'aperspective view of one of the supportingbrackets for the latter. Fig. 6is a detail side elevation of one of the bearings for the main shaft ofthe gririding-machine. Figs. 7 and 8 are detail views of thevertically-adjustable brackets which support the grinding mechanism.Figs. 0, 10, 11, 12, 13, 14:, and 15 are detail views illustrating theclamping device for holding the rollers steady while being operated uponby the grindirig-machine. Fig. 1G is a detail front view of the mainshaft of the grinding-niaehine carrying the grindingdisk and of thescrew for adjusting the said grinding-disk. Figs. 17 and 18 are detailsectional views taken on the lines ac and 1 y in Fig. 1.

The same numerals refer to the same parts in all the figures of thedrawings.

1 1 designate the vertical side beams of the frame, which are providedin the usual mannor with bearings for the rolls 2 2.

In the construction of the roller-frame and the arrangement of therollers no invention is claimed, and it will be understood that mypresent invention, which relates solely to the grinding mechanism, maybe applied to and operate upon a calendering-machine rollerframe of anydesired construction, or any other machine having two or morevertically-arranged rolls.

3 3 designate a pair of arms or brackets, which are secured,respectively, at the upper and lower ends of the side beams of themachinc-frame by means of screws or clamping bolts 4. The said arms orbrackets are provided at their outer ends with bearings 5 for the upperand lower ends of the vertical beams or posts 6, which constitute themain frame of my improved grinding attachment, and which, being mountedin these hearings, may be readily adjusted axially to assist in theadjustment of the parts of the device to be hereinafter described. Theupper and lower ends of the said beams or posts are rounded, as shown at7, so as to fit in their respective bearings, and the said posts, whichare by preference square in cross-section, are provided with verticallongitudinal slots 8, extending nearly through their entire lengths.

9 9 designate a pair of boxes, which are fitfed and mounted to slidevertically upon the beams or posts 6, said boxes consisting each of thefront and rear sections 10 and 11, which are provided with thelaterally-extending ears or lugs 12, connected by means of bolts 13.

11 are studbolts extending transversely through the boxes 9 and throughthe slot 8 in the vertical posts 6. Said stud-bolts are provided withinthe slots Swithinteriorly-serewthreaded eyes 15, forming nuts that workupon the vertical screw-threaded rods 16, which are located within thevertical beams 6 and have their hearings in the lower ends of the saidbeams and in brackets 17, mounted upon the upper sides of the upperbrackets 23, as will be clearly seen by reference to Figs. 1 and 2 ofthe drawings. The brackets or standards 17 are provided on their frontsides with boxes or bearings 18 for a shaft 19, which is provided withworms 20, meshing with worm-gears 21, which are mounted loosely upon thescrewthreaded shafts 16 near the upper ends of said shafts. The shaft 19isv provided adjacent to the boxes of bearings 18 with collars 22, having set-screws 23, by means of which the said collars may be adjustedupon the shaft 19, so as to prevent undue endwise movement of saidshaft. Motion may be imparted to the shaft 19 either by means ofhand-wheels 24 at one end thereof or by means of the fixed pulley 25,which is mounted upon its opposite end.

26 26 are loose pulleys mounted upon the shaft 19 adjacent to the fixedpulley 25, and

' straight and crossed belts run from the said pulleys 26 todriving-pulleys arranged upon asuitable shaft. (Not shown in thedrawings.) It will be seen that by this mechanism the shaft 19 may becaused to revolve in either direction, one of the driving-belts servingto revolve it in each direction and both of said belts running, whenidle, upon the loose pulleys 26 26.

The worm-gears 21 are provided at their upper ends with clutch-lugs 27,adapted to engage corresponding clutch-lugs 28 upon the lower ends ofclamping-collars 29, adjustable upon the upper ends of thescrew-threaded shafts 16 by means of set-screws 30. It will be seen thatby rotating the shaft 19 when the worm-gears 21 are connected with theclutches 29, and the latter are fixed upon the screw-threaded shafts,the latter may be rotated in either direction, according to thedirection in which the shaft 19 revolves, thus raising or lowering theboxes 9, as the case may be, by means of the stud-bolts 14, extendingtransversely through said boxes and havin g the screw-threadedperforations that work upon the shafts 16.

The boxes 9 are provided with forwardly-extending cylindrical tubulararms or brackets 31, upon which sleeves 32 are mounted to slide. Saidsleeves are provided on their upper sides with boxes or bearings 33, inwhich is mounted the main shaft 34, which is thus arranged transverselyto the roller-frame to which my improved grinding-machine is attached.The said main shaft is preferably made "tubular in shape, as shown inthe drawings hereto annexed, for the purpose of reducing the weight ofthe same without materially detracting from the strength. The boxes 33,that form the bearings of the said shaft, are provided with detachablecaps 35, secured in position by means of bolts 36, and which may beconveniently removed for the purpose of adjusting or removing the saidshaft, as oocasion may require. 7

The tubular brackets 31 are provided in their under sides withlongitudinal slots 37 to admit of the passage of the shanks 38 ofstud-bolts 39, the upper ends of which are provided with screw-threadedeyes 40, working upon screw-threaded shafts 41, that extendlongitudinally through the saidtubular brackets and are journaledsecurely in the inner ends of the latter. The stud-bolts 39 extendthrough openings in the under sides of the sleeves 32, that slide uponthe brackets 31, and are provided with nuts 42, by means of which theyare secured to the said sleeves. The outer ends of the shafts 41 areprovided with miter-gears 43, meshing with pinions 44, which are mountedupon the ends of a shaft 45, which is mounted transversely in suitablebearings 46 upon the front ends of the brackets 31. The pinions 44 areprovided with collars 47, having set-screws 48, by means of which theymay be secured rigidly upon the shaft 45, and which construction enableseither one of said pinions to be loosened temporarily when it shall bedesired to operate only one of said pinions for the purpose of adjustingor aligning the parts operated thereby, as may be required.

Collars 49, having set-screws 50, serve to retain the shaft 45 securelyin its bearings and to prevent it from moving laterally therein.

The shaft 45 is provided at one end with a hand-wheel 51, by means ofwhich it may be conveniently operated. It will be seen that by rotatingthe shaft 45 a rotary motion in either direction may be imparted to theshafts 41, which, as stated, are screw-threaded to engage thescrew-threaded eyes 40 of the bolts 39, which travel in the slots 37 ofthe brackets 31, and are permanently connected to the sleeves 32,traveling upon said brackets. The said sleeves may thus by thismechanism be moved in either direction inward or outward upon thebrackets 31, together with all the mechanism carried by the saidsleeves, and which will now be more fully described.

The shaft 34, journaled in the boxes 33, is provided ondiametrically-opposite sides with longitudinal feat-hers 52, extendingnearly along the entire length of said shaft and adapted to be receivedby the longitudinal grooves 53 of the longitudinally-sliding sleeves 54,the inner sides of which are provided with clamping-disks 55, adapted tobe connected by means of bolts or in any suitable manner and to hold theemery-wheel or grinding-disk 56, which is in this manner mounted uponand connected with the main shaft. The latter is provided near one ofits ends with the main driving pulley 57, which may be connected bymeans of a belt with suitable operating maohinery.

58 58 designate collars mounted adj ustably upon the main shaft adjacentto the boxes or bearings and serving to hold the said main shaftsecurely in position against lateral movement.

The boxes 33 of the main shaft or the caps 35 of said boxes are providedwith upwardlyextending brackets '59, the upper ends of which have boxesor bearings 60 for the ends of a screw-threaded shaft 61, which is thusmounted revolubly in a position parallel to the main shaft. Thescrew-threaded shaft 61 has a plain or unthreaded extension 62, theouter end of which is provided with a crank or hand wheel 63, and upon.which is mounted a fixed pulley 64c and two loose pulleys (35 65,adjacent to each other. The said loose pulleys are belted to the mainshaft by the straight and crossed belts 66 and 67, respectively, and itwill thus be seen that by shifting either of said belts onto the fixedpulley 6% the screw-threaded shaft (31 may be caused to revolve ineither direction. It will also be observed that the said screw-threadedshaft may, when desired, be operated by means of the crank or hand wheel63.

For the purpose of automatically shifting or shipping the belts (J6 and67 when the machine is in operation, I avail myself of mechanism asfollows: 68 designates a transverse rod or bar mounted in suitable boxesor bearings 69 in the position parallel to the screwthreaded shaft 61and the main shaft. Said rod or bar, which is arranged to slidelaterally in its bearings, is provided near one end with the links 7 Oand 71, encircling, respectively, the belts (5G and (57, and adapted toshift or ship the said belts from their respective loose pulleys ontothe intermediate fixed pulley 64, which may thus be caused to retate ineither direction. The sleeves 5t 54:, traveling upon the main shaft, asherein described, are provided with outwardly-extending arms 72, theouter ends of which have interiorly-screw-threaded eyes or openings 7 3for the passage of the screw-threaded shaft 6] by the revolution ofwhich the said arms or brackets carrying the sleeves 5e and thegrinding-disk 56 may thus be caused to travel in either direction uponthe main shaft. The shipping-bar 68 is provided with collars 7i,adjustable by means of setscrews 75. The brackets 72 have arms 7 6,adapted to engage the said collars 74c when the limit of the movement ofthe said brackets with their attachments has been reached.

Additional collars 7% are arranged upon the rod 68 outside the frame tolimit the movement of said rod and to prevent the belts from beingslipped off their respective pulleys by a too extensive movement of saidrod.

The operation of this part of the machine is as follows: Motion isprimarily imparted to the main shaft through the medium of the pulley57. The collars 74 are then set upon the shippingbar 68 in such a manneras to regulate the extent of the movement of the sleeves 54, carryingthe grinding-disk upon the said main shaft. The shipping-bar is thenadjusted in such a manner as to cause one of the belts (36 or 67 to runover the fixed pulley G4. The screw-threaded shaft (31 will thus becaused to revolve, and the brackets 72, carrying the sleeves 5i and thegrinding disk, will be caused to travel longitudinally upon the shafts61 and 34, respectively. When the limit of the movement has beenreached, the arm 7 (3 of one of the brackets 72 will ongage one of thecollars 74:, thus actuating the shi pping-bar, causing it to movelaterally in its bearin gs and to ship or shift the belt, which has beenworking upon the fixed pulley 64, onto one of the'loose pulleys and thebelt which has been working upon a loose pulley onto the fixed pulley.The direction of the rotation of the screw-threaded shaft 61 will thusbe instantly and automatically reversed, and the brackets 7 2, withtheir attachments, be caused to travel in an opposite direction untilthe arm 7 6 of the other bracket 72 comes in contact with the collar 74at the opposite end of the shipping-bar, when the operation is againautomatically reversed. This operation continues as long as the machineis in motion or until the shipping-bar is so oper ated by hand as toplace both of the belts 66 and 67 in engagement with the loose pulleys65. The operation of the main shaft having the grinding-disk may thencontinue, the said grinding-disk remaining stationary upon the mainshaft. hen themachine is in this position, the grinding-disk 56 may beadjusted laterally by means of the crank or hand wheel (33 upon thescrew-threaded shaft 61.

For the purpose of holding and steadying the rolls securely in theirframe while being operated upon by my improved grinding mechanism, Iavail myself of the clamping device illustrated in detail in Figs. 9 to15, inclusive, of the drawings. The said clamping device comprises aplate or bracket 7 7, which is substantially T-shaped, the body of whichis provided with openings 7 8, adapted to receive the hook-bolts 7 9, bymeans of which the said plate or bracket is clamped upon the I-beams 80,which form the frame in which the rollers are mounted, substantially asshown in Fig. 10 of the drawings. The vertical portions 81 of theT-shaped brackets 77 are provided with perforations 82 82, near theirupper and lower ends, adapted to receive the horizontal belts orscrewthreaded rods 83, the inner ends of which are screwed into theupper and lower ends of the yokes Si. Sliding yokes 85 are adjusted uponthe bolts 83, and the yokes 81- and 85 are provided on their inner sidesor faces with sockets S6, in which are seated the balls or rollers 87.

In practice the yokes Si and 85 are arranged upon opposite sides of andin such a manner as to clamp the neck of the roller which is to beoperated. upon. Nuts 88 are arranged to be tightened up against theplate 77, for the purpose of drawing the bolts 83 with the yoke 84 uptightly against the neck of the roller. The plate or portion 81 of thebracket 77 provided with a central perfo-. ration 89, through whichpasses a set-bolt 90, adapted to bear against the yoke 85, which is thuslikewise forced up against the neck of the roller. Janrnuts 91 aremounted upon the bolts 83 and adjacent to the plate or bracket 7 7, forthe purpose of retaining the parts in position. when adjusted.

One of the clamping devices just described roller which is to beoperated upon, and which is thus connected firmly with the frame in.

which it is mounted, thereby rendering it impossible for the said rollerto shake or tremble while being operated upon. The friction balls orrollers 86 will adjust themselves in the yokes in which they are seatedto the necks of the rollers upon which they are mounted, and it willthus be seen that the clamping devices are equally applicable to rollersof diiferent sizes and diameters and having either straight or inclinednecks.

The operation and advantages of my improved roller-grindin g machinewillbe readily understood from the foregoing description, taken inconnection with the drawings hereto annexed.

The grinding mechanism may be conveniently attached to a roller-frame ofany size and description by means of the clamps or brackets 3 3. Usuallya number of rollers are mounted vertically in the same frame, and itwill be seen that by means of the vertical screw-threaded shafts 16 theboxes 9, with their attachments and carrying the complete grindingmechanism, may be adjusted vertically, so as to bring the grinding-diskinto vertical alignment with any one of the rollers which it may bedesired to operate upon. This adjustment, it will be seen, may beeffected either by hand or by means of suitable power applied throughthe medium of the pulleys 25 and 26. ism, substantially like thatemployed in connection with the belts 66 and 67, may be employed for thepurpose of shifting or shipping the belts upon the pulleys 25 and 26;but such .will not usually be" required, and has not therefore beenshown in the drawings.

When the machine is first started, the emery-wheel or grinding-disk 56may be at some distance from the face of the roller which is to beoperated upon. After the machine has been started the shaft 45 may beoperated by means of the hand-wheel 51, soas to bring the saidemery-wheel into contact with the face of the roller with any desireddegree of pressure.

The grinding-disk may, When desired, be suffered to remain stationaryupon the main shaft; or it may, by the mechanism herein described,becaused to reciprocate upon the said shaft, thus bringing the saidemery-wheel or grinding-disk into contact with the face of the rollerfor the entire length of the latter; or, when desired, the lateralmovement of the grinding-disk may be limited to any desired extent, asmay, for instance, be required,when the face of the roller is to beground out of the true cylindrical shape.

The construction of the machine is such that it may be easily andconveniently applied to or detached from the frame the rollers of whichare to be operated upon.

Several of the more important and expen- Shipping .mechan-V sive partsof the machine-such as the screwthreaded shafts-are removable andinterchangeable, so that they may be changed from one machine toanother, as will be found very useful in large mills where more than onegrinding-machine is used.

The general construction of my improved roll-grinding machine is simpleand inexpensive, and by its use the rolls maybe ground without beingdetached from the frame in which they are mounted, this being usually animportant item of expense.

By means of the clamping device herein described the rolls may beheldsecurely and steadily while being operated upon, and a true and smoothface is thus assured by the use of my improved grin ding-machine and itsattachments.

WVhile I have herein described the preferred form of my invention, Iwould have it understood that numerous changes in the detailconstruction might be made without affecting the successful operation ofthe machine in the least, and I reserve the privilege of making any suchchanges and modifications as may be resorted to without departing fromthe spirit of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The combination, with a roller-frame having a set of rollers mountedpermanently therein, of a grinding-machine and means for mounting thesame detachably upon the said frame, and a clamping device adapted toconnect the rollers with the frame in which they are mounted and to holdthem steady during the operation of the grinding mechanism,substantially as set forth.

2. In a roll-grinding machine, the combination, with brackets adapted tobe connected detachably to a roller-frame, of vertical beams or supportsadapted to be mounted in said brackets and having vertical slots formedtherein, the boxes arranged to slide vertically upon said beams orsupports, said boxes carrying the grinding mechanism and provided withtransverse stud-bolts extending through the slots in the vertical beamsor supports and having interiorly-screw-threaded eyes,

the vertical screw-threaded shafts extending through the beams orsupports, engaging the screw-threaded eyes in the stud-bolts of thevertically-adjustable boxes, and having bearings in brackets orstandards extending upwardly from the upper supporting-brackets,worm-wheels mounted loosely upon the said screws, a transverse shafthaving worms meshing with the said worm-wheels, mechanism for operatingthe said shaft, and means for connecting the said worm-wheels rigidlywith the screws, upon which they are respectively mounted, substantiallyas set forth.

3. In a roll-grinding machine, the combination, with a frame havingvertical side beams or standards, and brackets supporting said standardsand adapted to be connected ITO detachably to the frame in which therolls are permanently mounted, of the boxes arranged to slide verticallyupon the side beams, the screw-threaded vertical shafts engagingtransverse stud-bolts in the said boxes,wormwheels mounted loosely uponthe upper ends of said shafts and having u pwardly-extendin g clutch-lugs, clamps arranged upon said screwthreaded shafts above saidworm-wheels and having set-screws by means of which they may be securedrigidly thereon, and downwardlyextending lugs adapted to engage those ofthe worm-wheels, a transversely-arranged shaft having worms engaging thesaid worm-wheels, and mechanism for operating the said shaft in eitherdirection, substantially as and for the purpose set forth.

4. In a roll-grinding machine, the combination of vertical side beams orstandards, brackets supporting said standards and adapted to beconnected detachably to the frame in which the rolls to be ground arepermanently mounted, boxes arranged vertically adj ustably upon the saidside beams and having forwardly-extendin g brackets sleeves mountedlongitudinally adj ustably upon the said brackets, a main shaftjournaled in boxes or bearings upon the said sleeves, and an emery-wheelor grinding-disk mounted adjustably upon the said shaft, substantiallyas and for the purpose set forth.

5. In a roll-grinding machine, the combination of the vertical sidebeams or standards, the boxes arranged to slide vertically upon the sameand having forwardly-extending tubular arms or brackets, the sleevesarranged to slide upon said brackets, grinding mechanism mounted on saidsleeves, the stud-bolts extending through longitudinal slots in thesaidbrackets and connected rigidly with the 1011- gitudinally slidingsleeves, suitably mounted screw-threaded shafts extending throughscrew-threaded eyes in the said stud-bolts and having pinions at theirfront ends, and a transverse shaft having m'itengears meshing with saidpinions and provided at one end with a hand-wheel by means of which itmay be manipulated, substantially as set forth.

6. In a roll-grinding machine, the combination, with the boxesadjustable vertically upon suitable side beams or supports and havingforwardly-extending brackets, of the sleeves adjustable longitudinallyupon said brackets, the main shaft mounted in suitable bearings uponsaid sleeves, a pair of sleeves or collars arranged to slide upon thesaid shaft and having spline or grooves adapted to engage longitudinalkeys 01' feathers in the said shaft, and provided withoutwardly-extending brackets having transverse screwthreaded eyes oropenings, an emery-wheel or grinding-disk clamped between said slidingsleeves or collars, a transverse screw-threaded shaft extending throughthe screw-threaded eyes or openings in the outwardly-extending bracketsof said sleeves, and mechanism for imparting the rotary motion in eitherdirec tion to the said screw-threaded shaft, substantially as set forth.

7. In a roll-grinding machine, the combination of the vertical sidebeams, the boxes mounted ad justably upon the same andhavingforwardly-extending brackets, the sleeves sliding longitudinallyupon said brackets, the main shaft mounted in bearings upon saidsleeves, the collars sliding longitudinally upon said shaft, anemery-wheel or grinding disk, brackets extending outwardly from saidcollars and having transverse screw-threaded eyes or openings, atransverse screw-threaded shaft extending through and engaging saidopenings, and mechanism for imparting rotary motion to the saidscrew-threaded shaft and means for automatically reversing thedirect-ion of its rotation, substantially as herein set forth.

8. In a roll-grinding machine, the combination of the vertical sidepieces or supports, the vertically-adj ustable boxes upon said sidebeams, having forwardly-extending brackets, the sleeves mountedadjustably upon said brackets, the main shaft journaled in suitablebearings upon said sleeves, the collars feathered upon said shaft,sliding longitudinally thereon and having outwardly-extending bracketsprovided with transverse screwthreaded eyes or openings, an emery-wheelor grinding-disk mounted between said collars, arms extending from thelatter and adapted to engage collars upon the shippingbar of thebelt-shifting mechanism, the transverse screw-threaded shaft extendingthrough and engaging said screw-threaded eyes or openings 'and having afixed pulley and two loose pulleys adjacent thereto, a straight and acrossed belt connecting said pulleys with the main shaft, atransverselyarranged shipping-bar mounted to slide laterally in suitablebearin gs and having links encircling the said belts, and collarsmount-ed adjustably upon the said shipping-bar, substantially as hereinset forth.

9. In a roll-grinding machine, the combination of vertical beams orstandards, brackets supporting said standards and adapted to beconnected detachably to the frame in which the rolls to be ground arepermanently mounted, boxes arranged to slide vertically upon said beamsor standards, mechanism for adjusting said boxes and for retaining themin any position to which they may be adjusted, sleeves arranged to slideupon brackets extending forwardly from said verticallyadjustable boxes,the main shaft mounted in bearings upon said sleeves, the grinding-diskarranged. to slide laterally upon said main shaft, and mechanism foroperating the said grindingdisk and for automatically reversingthedirection of its lateral movement upon said main shaft, substantiallyas herein set forth.

10. The combination, with the hereindescribed roll-grinding machine, ofa roller frame, a clamping device comprising a pair the said sockets,and bolts and nuts connecting the said yokes together and clamping themupon the neck of the roll and connecting them rigidly With the plate orbracket at tached to the roll-frame, substantially as and for thepurpose set forth.

In testimony-that I claim the foregoing as my own I have hereto affixedmy signature in presence of two Witnesses.

HIRAM N. J. MANSFIELD.

\Vitnesses:

THoMAs CANTWELL, JOHN M. OANTWELL.

